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Evidence-Based Complementary and Alternative Medicine
Volume 2011 (2011), Article ID 450529, 8 pages
http://dx.doi.org/10.1093/ecam/nep230
Original Article

Study of the Anti-Proliferative Activity of 5-Substituted 4,7-Dimethoxy-1,3-Benzodioxole Derivatives of SY-1 from Antrodia camphorata on Human COLO 205 Colon Cancer Cells

1Department of Chemistry, Tunghai University, Taichung, Taiwan
2Yusheng Biotechnology Co. Ltd., Taichung, Taiwan
3Institute of Biochemistry, College of Life Science, National Chung Hsing University, Taichung, Taiwan
4Department of Life Science, National Chung Hsing University, Taichung, Taiwan
5Department of Applied Chemistry, Chung Shan Medical University, No. 110, Sec. 1, Jianguo N. Rd., Taichung 402, Taiwan
6Department of Biochemistry, Chung Shan Medical University Hospital, Taichung, Taiwan

Received 27 July 2009; Accepted 25 November 2009

Copyright © 2011 Hsiu-Man Lien et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A set of 10 4,7-dimethoxy-1,3-benzodioxole derivatives based on a lead compound previously discovered by our group, SY-1, which was isolated from Antrodia camphorata, were evaluated for their in vitro inhibitory activity on human colorectal carcinoma cells (COLO 205). Structure-activity relationship studies of the 10 compounds indicated the importance of the chain length of the alkyl group at the 5-position, and the 2-propenyl substituent named “apiole” exhibited the most potent inhibitory activity. In the present study, we demonstrate that the SY-1 analogue “apiole” decreased the proliferation of COLO 205 cells, but not that of normal human colonic epithelial cells (FHC). The G0/G1 cell cycle arrest induced by apiole (75–225 μM) was associated with significantly increased levels of p53, p21 and p27 and decreased levels of cyclin D1. Concerning COLO 205 cell apoptosis, apiole (>150 μM) treatment significantly increased the levels of cleaved caspases 3, 8, 9 and bax/bcl-2 ratio and induced ladder formation in DNA fragmentation assay and sub-G1 peak in flow cytometry analysis. These findings suggest that apiole can suppress COLO 205 cell growth; however, the detailed mechanisms of these processes require further investigation.